Micrometer.



v No. 798,934.

v PATENTBDSBPT. 5, 1905.

L.'VUITHIER.

MIGROMETER.

' APPLIUATIONFILBD Dpo.24,19o4.

2 SHEETS-SHEET l.

Arron/v Ys.

v PATBNTED SEPT. 5, 1905.

L. VUITHIBR.

MIGROMBTER.

APPLICATION FILED DEO.24,190&.

2 BHEETB-BHEIHT 2.

q. f u M 0 2 z f fk R le s e f Z e .IZ /l e I L.. ,s n x e I G b Pa n 1lF w/mess L UNITED STATES Louis VUITHIER, oF LODE, SWITZERLAND.

' Speeiation of Letters Patent.

Patented 5, 1 905.

Application filed December 24, 1904. Serial No. 238,259.' l

To all w'm'lgt it 11u14/ concern:

Be it known that I', LoUIs VUrrnInR, a citizen of the Republic ofSwitzerland, and a resident of Lode, Switzerland, haveinvented certainnew and useful Improvements in Micrometer-Gages, of which the followingis a-speciiication.

This invention relates to micrometer-gages, such as used for measuringvery small dimensions; and among the objects of the invention is theprovision'of an instrument of this type by means of which themeasurement taken will be accurately registered' upon 'a dial.v

The invention also aims to provide a micrometer-gage provided with `a"corrector for offsetting the inaccuracies of-measnrement which wouldotherwise be caused by the unavoidable inaccuracies in forni of theoperative parts; and with these ends lin View the invention consists ina micronieter-gage cmbodying the novel features and combinations ofparts to be hereinafter described, and recited in the claims.

In the accompanying drawings, Figure 1 is an elevation of amicrometer-gage embodying my invention, the dial and themeasuring-spindles being arranged horizontally. Fig. 2 is a plan view ofthe instrument shown in Fig. 1. Fig. 3 is a front elevation 'of anupright micrometer-gage constructed according to my invention, 'thelower portion thereofl being shown in section. Fig.. 4 is a sideelevation of the instrument shown in Fig. 3. Fig. 5 is an elevation ofthe operative -parts contained in the casing of the instrument, the dialand hands being removed; and Fig. 6 is a central section through'saidcasing, the dial and hands being in position.

Similar characters of reference indicate corresponding parts throughoutthe several views.

The instrument shown in Figs. 1 and 2 comprises a frame, the base a ofwhich is intended to be placed upon a horizontal base-plate or othersuitable support. The base L supports acasing b, which contains theindicating mechanism. c indicates a curved arm fastened to the base aand casing L, as shown in'Fig. l, and carrying at its outer end aspindle d, which is adjusted by hand and fixed in adjusted position ybymeans of a set-screw e, the end-of said spindle being intendedto abutagainst the object to be measured. A longitudinallymovable spindle orrod f extends through the casing I; and is adapted Vto press at one endagainst the object, so as to retain thesame be- .f

tween it and the spindle d, the spindles d and f being axially alined. lA knob f serves'toadjust the spindle f, which actuates the indicatingmechanism by means of which the measurement is indicated upon the dialcarried 'by thecasing by the hands z, and 71.

The indicating mechanism, which is of substantiall y the sameconstruction in both the horizontal andupright forms of the gage, isshown in Figs. 5 and 6. The spindlef is movable longitudinally throughthe casing L, as explained, and is also rotatable in its bearings, beingprovided throughout a portion of its length with screw-threads f2, whichengage a pinion acting in-the manner of a. Vrack to rotate saidpinion'when said spindle f is shifted longitudinally and as a wormtorotate the salme upon the rotation ofrsaid spindle. The shaft of thepinion carries a gearwheel l, which in turn operates a pinion fm., uponwhich the hand 1f is mounted. rl.`he other hand /l4 is keyedto the arborof the gear-wheel l and pinion l. may measure in decimalfractions, thepinion is preferably provided" with ten teeth and the gear-wheel [withone hundred teeth. Supposing the threaded portion of the shaft j' tohave a pitch of one millimeter, the hand 1i will register upon the dialthe hundredths' Vof a millimeter and the hand h, secured to the arbor ofthe gear-wheel Z and pinion Z', will register in millimeters un to tenmillimeters. A fixed piece 9L is secured to the spindle f intermediatelyof its length, and a spring l". is interposed between the side wall ofthe casing and said fixed piece, as shown in Fig. 5', in order tonormally maintain the rod fand member d, with which it cooperates, inengagement with each other, the tendency of the spring acting uponthefixed piece n being to fo'rce the spindle f longitudinally toward thespin- .dle d. In order to permit of the insertion of the object to bemeasured between the spindles d and f, a lever q is provided, which ispivoted adjacentA the rod f and abuts at its`inner end against the fixedpiece n., as shown best in Fig. 6, so that upon th e pivotal movement ofsaid lever the fixed piece o1., and consequently the spindlef, will beforced away from the spindle d against the tension of the spring` c. Inorder to offsetthe errors of measurement which are liableito occur,owing to slight In order that the instrumentv inaccuracies in thethreading of the rodor spindle f or in the teeth of the gear-wheels,

IIG

/a'i'corrector is provided, which consists, es-

sentially, of a guide-plate p, which is maintained in position bysetscrews .ai an'd as', as shown in Figs.V and 6, and which thereforemay be easily withdrawn when it is necessary to change the forin of theslot .y thereinfand 5 replaced in position. The guideplate p is pro`vided with a slot y.as shown in Fig. 6. in `which'is movablean outwardly-extending arm -o, carried bythe fixed piece n.. It is ob-` vious thatby means of the slot y the spindle I0 f may be rotated slightly; by therocking Vof the arm o, guided il'the slot y, the conse quent rotation ofthe screw-threadsf' effecting the rotation of the pinion l' inthe samemanner as when the-spindle f is shifted lon- 'l5V gitudinally. When theinstrument is constructed, the slot yin the guidefplate p is-cut in sucha form asto cause the rotationpf the l spindle f either in order toadvance or set back thepinion l', and consequently thefhands 2 h and z',.thus offsetting the inaccuracies oflthe instrument. At the pointsin the.movement of the spindle in which the inaccuracies of4 Ithe operativeparts do not aiect the measurement the guide-slot y is vformed parallelitc the spindle f, so that no rotation of the latter ywill take place.The shape of the guideslot can be readily plotted for each instrument byascertaining the occurring errors by comparison with a-standard. `Ablock 'or other 3G object'of standard dimensions is Vplaced be -tweenthe'parts d and f and the measurementV taken. If the measurement thusindicated by the pointer is too great ortoosmall, the s lot in theguide-plate has to be cut in su'ch a manln'eras to set back or advancethe pointenfand .thus rectify the error. by using a number ofsuchstandards of different sizes the groove may be plotted so as to properlycontrol the measuring-spindle 4 throughout-the length of its movement.

In the form of the instrument shown in Figs. 3 and 4 the vertical rod d,which serves as a fixed support, carries a horizontal plated'.,

which can be very accurately'iixed in a vertical position by means oftwo set-screws fr and s, which are screwed into the base a, the conicalends thereof engagingconical .recesses in the spindle d. By screwing thescrew r the rod or spindle d will be raised, and -by screw-.

5 -ing the screw y.s'the said rod will lowered;

When both screws are adjusted, the rod. d will;

bey {irmly clamped in the vdesired vpositony l The casing b,furthermore, carries atoitsoppo-.g site end wxed jaw b", and theopposite endl A of the'rdr spindle f carries a correspondmy f .ingmovable jaw b. These jaw'sb" and bu It is apparent that.

be used for lmeasuring objects which cannot.

between the spindle f and as new and desire to secure by LettersPatentev 1. In a-mi'crometer-gage, the combination,

Vwith a measuring-spindle mounted for rotation,.of meansforlongitudinally shifting said spindle, indicating mechanism' actuated.by both the longitudinal andthe rotary move- 'ment of said spindle, andYmeans Vfor rotating the latter atpredetermined 4points -in itsldfngitudinal movement.

2. 'In a micrometer-gage, fthe combination,

with va Vrotary longitudinally-shiftable measuring-spindle provided withscrew-threads, of

ter, anarm fixed to said spindle andmeanseforrocking said ar'm atpredetermined points-in vthe longitudinal movement'ofsaid spindle inindicates the measurement.

4. A micrometer-gage includ-ing a rotary longitudinally shiftablemeasuring spindle, indicating mechanism operable by vboththelongitudinaland the rotarymovement'of said spindle, an arm iixed to'saidspindle, and means for guiding said arm.

`a pinion meshing with said screw-threads and rotatable by both thelongitudinal and rotary -orderto advance or set back the pointer .which5. Amicrometer-gage including a-rotary .y

longitudinally shiftable measuring spindle,

indicating mechanism operable by .both the. longitudinal and the 'rotarymovementof saidA spindle, an arm ,ixedtosaid spindle, and a 1guide-plate engaging said arm.

46. In a micrometer-mathe combination, with a rotaryvlongitudinally-shiftable -measuring-spindledndicati'n mechanismgovernedby .both thelougitudinalandrotary movement of said spindlegaguidefplategprovided with aslot, and an armv able in said slot.; f l

' In testimonylwherejo'fl havesignedmy name to this specification n'fthe'presence of twosub xedto saidspindle andmovjet-@tion 'in dass'Paita Itis hereby certified that Ehe resids of the' puede@ in LettersPatent No. 793,934,

September 5, 1905, upon the applicatioliof Louis Vuithier, for animprovement' -I `giu Micrometers, was erroneouslyjwrittm land printedLode, Switzerlandfl wh/ereas fsaid residence should have been writtenand printedv Lode', Switzerland; and that said Letters Patent should bereadwith this correction therein lthat the same mayconform i lto therecord of the case in the Pa t signed and sealed this 117th day ofoctober-',a. D., 1905. [sus] 1 Y F. I. 'ALLEN I" CmaminioneofPatenb.. A

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tained in position by setscrews .ai an'd as', as shown in Figs.V and 6,and which therefore may be easily withdrawn when it is necessary tochange the forin of the slot .y thereinfand 5 replaced in position. Theguideplate p is pro` vided with a slot y.as shown in Fig. 6. in`which'is movablean outwardly -extending arm -o, carried bythe fixedpiece n.. It is ob-` vious that by means of the slot y the spindle I0 fmay be rotated slightly; by the rocking Vof the arm o, guided il'theslot y, the conse quent rotation of the screw-threadsf' effecting therotation of the pinion l' inthe same manner as when the-spindle f isshifted lon- 'l5V gitudinally. When the instrument is constructed, theslot yin the guidefplate p is-cut in such a form asto cause therotationpf the l spindle f either in order to advance or set backthepinion l', and consequently thefhands 2 h and z', .thus offsettingthe inaccuracies oflthe instrument. At the pointsin the .movement of thespindle in which the inaccuracies of4 Ithe operative parts do not aiectthe measurement the guide-slot y is vformed parallel itc the spindle f,so that no rotation of the latter ywill take place. The shape of theguideslot can be readily plotted for each instrument by ascertaining theoccurring errors by comparison with a-standard. `A block 'or other 3Gobject'of standard dimensions is Vplaced be -tween the'parts d and f andthe measurementV taken. If the measurement thus indicated by the pointeris too great ortoosmall, the s lot in the guide-plate has to be cut insu'ch a manln'eras to set back or advance the pointenfand .thus rectifythe error. by using a number ofsuch standards of different sizes thegroove may be plotted so as to properly control the measuring-spindle 4throughout-the length of its movement.

In the form of the instrument shown in Figs. 3 and 4 the vertical rod d,which serves as a fixed support, carries a horizontal plated'.,

which can be very accurately'iixed in a vertical position by means oftwo set-screws fr and s, which are screwed into the base a, the conicalends thereof engagingconical .recesses in the spindle d. By screwing thescrew r the rod or spindle d will be raised, and -by screw-.

5 -ing the screw y.s'the said rod will lowered;

When both screws are adjusted, the rod. d will;

bey {irmly clamped in the vdesired vpositony l The casing b,furthermore, carries atoitsoppo-.g site end wxed jaw b", and theopposite endl A of the'rdr spindle f carries a correspondmy f .ingmovable jaw b. These jaw'sb" and bu It is apparent that.

be used for lmeasuring objects which cannot.

between the spindle f and as new and desire to secure by LettersPatentev 1. In a-mi'crometer-gage, the combination,

Vwith a measuring-spindle mounted for rotation,.of meansforlongitudinally shifting said spindle, indicating mechanism' actuated.by both the longitudinal andthe rotary move- 'ment of said spindle, andYmeans Vfor rotating the latter atpredetermined 4points -in itsldfngitudinal movement.

2. 'In a micrometer-gage, fthe combination,

with va Vrotary longitudinally-shiftable measuring-spindle provided withscrew-threads, of

ter, anarm fixed to said spindle andmeanseforrocking said ar'm atpredetermined points-in vthe longitudinal movement'ofsaid spindle inindicates the measurement.

4. A micrometer-gage includ-ing a rotary longitudinally shiftablemeasuring spindle, indicating mechanism operable by vboththelongitudinaland the rotarymovement'of said spindle, an arm iixed to'saidspindle, and means for guiding said arm.

`a pinion meshing with said screw-threads and rotatable by both thelongitudinal and rotary -orderto advance or set back the pointer .which5. Amicrometer-gage including a-rotary .y

longitudinally shiftable measuring spindle,

indicating mechanism operable by .both the. longitudinal and the 'rotarymovementof saidA spindle, an arm ,ixedtosaid spindle, and a 1guide-plate engaging said arm.

46. In a micrometer-mathe combination, with a rotaryvlongitudinally-shiftable -measuring-spindledndicati'n mechanismgovernedby .both thelougitudinalandrotary movement of said spindlegaguidefplategprovided with aslot, and an armv able in said slot.; f l

' In testimonylwherejo'fl havesignedmy name to this specification n'fthe'presence of twosub xedto saidspindle andmovjet-@tion 'in dass'Paita Itis hereby certified that Ehe resids of the' puede@ in LettersPatent No. 793,934,

September 5, 1905, upon the applicatioliof Louis Vuithier, for animprovement' -I `giu Micrometers, was erroneouslyjwrittm land printedLode, Switzerlandfl wh/ereas fsaid residence should have been writtenand printedv Lode', Switzerland; and that said Letters Patent should bereadwith this correction therein lthat the same mayconform i lto therecord of the case in the Pa t signed and sealed this 117th day ofoctober-',a. D., 1905. [sus] 1 Y F. I. 'ALLEN I" CmaminioneofPatenb.. A

vIQQ

said residence hould have been writtn and printed Lock, Switzerland; andthat said lto the record of the case in the Paiexxlt Oce.

Signed and sealed this 17th day of October, A. D.` 191 i5.

[SEAL] F. I. ALLEN,

